Question: What Is The Difference Between Juvenile Phase And Vegetative Phase?

What marks the beginning of reproductive phase in higher plants?

The end of juvenile/vegetative phase which marks the beginning of the reproductive phase can be seen easily in the higher plants when they come to flower..

What triggers senescence?

Cellular senescence is an essentially irreversible growth arrest that occurs in response to various cellular stressors, such as telomere erosion, DNA damage, oxidative stress, and oncogenic activation, and it is thought to be an antitumor mechanism.

What are vegetative symptoms?

Clinical Features Several studies reported that between 50 and 87% of patients present with depressed mood. Other common symptoms encountered in more than 25% of the patients include insomnia, other vegetative symptoms (e.g., palpitations), behavioral problems, social withdrawal, and suicidal ideation or gesture.

What makes the end of reproductive phase?

Reproductive phase in both females and males begin at puberty. In males, reproductive phase lasts until death but in females, it ends by the age of 50 years. Menstrual cycle/ menstruation mark the commencement of puberty in girls.

Can vegetative state be reversed?

The persistent vegetative state could be reversed in part by weekly injections with activated immune cells. After therapy, our patient responded to commands in addition to regaining spontaneous movements of both arms and the ability to swallow.

What is meant by juvenile phase?

Answer: (1) Juvenile phase – It is the period of growth after birth in an individual organism, and before it meets reproductive maturity. (2)Reproductive phase – It is the time when a human organism sexually reproduces.

What is the meaning of vegetative phase?

The period of growth between germination and flowering is known as the vegetative phase of plant development. During the vegetative phase, plants are busy carrying out photosynthesis and accumulating resources that will be needed for flowering and reproduction.

Why is it called vegetative state?

The name vegetative state was chosen to refer to the preserved vegetative nervous functioning, meaning these patients have (variably) preserved sleep-wake cycles, respiration, digestion or thermoregulation.

What kind of reproduction takes place in grass and onion?

asexual reproductionNatural methods of asexual reproduction include strategies that plants have developed to self-propagate. Many plants—like ginger, onion, gladioli, and dahlia—continue to grow from buds that are present on the surface of the stem.

What period of life do a girl is already capable of reproduction?

Puberty is the process of physical changes by which a child’s body becomes an adult body capable of reproduction. For females, puberty is marked by the onset of menstruation, an important milestone in their reproductive lives.

Has anyone recovered from vegetative state?

About 50% of persons who are in a vegetative state one month after traumatic brain injury eventually recover consciousness. They are likely to have a slow course of recovery and usually have some ongoing cognitive and physical impairments and disabilities.

Can a person recover from vegetative state?

Any recovery from a vegetative state is unlikely after 1 month if the cause was anything other than a head injury. If the cause was a head injury, recovery is unlikely after 12 months. However, a few people improve over a period of months or years. Rarely, improvement occurs late.

What is the senescent phase?

1 : the state of being old : the process of becoming old. 2 : the growth phase in a plant or plant part (such as a leaf) from full maturity to death. Other Words from senescence Did You Know?

At what age does senescence begin?

Senescence literally means “the process of growing old.” It’s defined as the period of gradual decline that follows the development phase in an organism’s life. So senescence in humans would start sometime in your 20s, at the peak of your physical strength, and continue for the rest of your life.

What is vegetative reproduction example?

For example, liverworts and mosses form small clumps of tissue (called gemmae) that are dispersed by splashing raindrops to form new plants. Bulbs, corms, offsets, rhizomes, runners, suckers, and tubers are all important means of vegetative reproduction and propagation in cultivated plants.

What are the 3 types of reproduction?

Key Points. Asexual reproduction includes fission, budding, fragmentation, and parthenogenesis, while sexual reproduction is achieved through the combination of reproductive cells from two individuals. … Key Terms. … Methods of Reproduction: Asexual & Sexual.Asexual Reproduction. … Fission. … Budding. … Fragmentation. … Parthenogenesis.More items…•

What does vegetative mean?

1 : relating to, composed of, or suggesting vegetation. 2 : of or relating to the division of nature comprising the plant kingdom. 3 : leading a dull, monotonous, or passive existence : vegetable entry 2 sense 3.

Is senescence reversible?

We can only say senescence is “reversible” when it becomes phenotypically and functionally identical to its pre-senescent state that no longer contains DNA damage. … Therefore, senescence is a permanent state…at least until they are likely eliminated by the immune system.

Do vegetative patients feel pain?

IT IS a nightmare situation. A person diagnosed as being in a vegetative state has an operation without anaesthetic because they cannot feel pain.

Can a person in a vegetative state hear you?

Other studies have shown that up to 20 percent of patients in various vegetative states can hear and respond on at least some level. … “Although a clinical vegetative state diagnosis implies lack of consciousness and cognition, this is not necessarily always the case.”

What is reproduction Short answer?

Very Short Answer Type Questions Answer: The process by which an organism produces its offspring is called reproduction. … Answer: When a single parent is involved in reproduction and gamete formation does not happen, it is called asexual reproduction.

What marks the end of juvenile phase?

Answer. The end of the Juvenile phase or Vegetative phase in flowering plants is marked by the beginning of Reproductive phase and reproductive phase can be seen easily in the plants when they come to flower.

What are the phases of reproduction?

We can divide it into three stages: Pre-fertilization, Fertilization, and Post-fertilization.

What is reproductive phase in plants?

The time interval between initiation of successive leaf or flower primordia at the shoot apical meristem. Reproductive phase transition. The transition from vegetative to reproductive growth when the competent SAM responds to signals that evoke floral initiation and, after evocation, becomes determined to flower.